Ed, Tim was chasing up the Key / Keys family connection to his Sarah Adair.Would they have been your Adair family ? This Sarah Adair family may have been from NY (Argyll patent) whose father, William Adair was cousin of D. Reid.Believe they were from Benmore / Bowmore, Scotland.May have been joined later with other Adairs from that area, Alexander Adair of Florida, Montgomery Co. NY.
This William Adair may have gone to Augusta Co, VA and died in the 1760s.May have come out with Campbell c.1739/40. There was a John Adair who m. Margaret / Mary Campbell (her 2nd marriage), and John may have been son of John Adair (Knoxville, TN) family.
Also there may have been land in SC sold to / by James Adair to a Margaret Campbell.May have been dau. of Morgan Campbell.